﻿using System.Collections.Generic;
using System;
using System.Linq;
using System.Reflection;
#if !SLUA_STANDALONE
using UnityEngine;
#endif
using System.IO;

namespace SLua
{

    public class Lua3rdMeta
#if !SLUA_STANDALONE
        : ScriptableObject
#endif
    {
        /// <summary>
        ///Cache class types here those contain 3rd dll attribute.
        /// </summary>
        public List<string> typesWithAttribtues = new List<string>();

        void OnEnable()
        {
#if !SLUA_STANDALONE
            this.hideFlags = HideFlags.NotEditable;
#endif
        }
#if UNITY_EDITOR

        public void ReBuildTypes()
        {
            typesWithAttribtues.Clear();
            Assembly assembly = null;
            foreach (var assem in AppDomain.CurrentDomain.GetAssemblies()) {
                if (assem.GetName().Name == "Assembly-CSharp") {
                    assembly = assem;
                    break;
                }
            }
            if (assembly != null) {
                var types = assembly.GetExportedTypes();
                foreach (var type in types) {
                    var methods = type.GetMethods(BindingFlags.Public | BindingFlags.Static);
                    foreach (var method in methods) {
                        if (method.IsDefined(typeof(Lua3rdDLL.LualibRegAttribute), false)) {
                            typesWithAttribtues.Add(type.FullName);
                            break;
                        }
                    }
                }
            }
        }

#endif
        private static Lua3rdMeta _instance = null;
        public static Lua3rdMeta Instance
        {
            get {
#if !SLUA_STANDALONE
                if (_instance == null) {
                    _instance = Resources.Load<Lua3rdMeta>("lua3rdmeta");
                }

#if UNITY_EDITOR
                if (_instance == null) {
                    _instance = ScriptableObject.CreateInstance<Lua3rdMeta>();
                    string path = "Assets/Slua/Meta/Resources";
                    if (!Directory.Exists(path)) {
                        Directory.CreateDirectory(path);
                    }
                    UnityEditor.AssetDatabase.CreateAsset(_instance, Path.Combine(path, "lua3rdmeta.asset"));
                }

#endif
#endif
                return _instance;
            }
            set {
                _instance = value;
            }
        }
    }
}
